Abstract: A self-propelled floor processing device includes a base body, a driving device, and an obstacle detection device for detecting a collision between the floor processing device and an obstacle, wherein the obstacle detection device has a bumper arranged in a protruding position on the base body, as well as at least one impact sensor allocated to the bumper. The impact sensor is configured to detect a displacement of the bumper relative to the base body. In order to create an obstacle detection device that functions optimally independently of a position and direction of a force acting from outside, the bumper is mounted to the base body via at least one swivel joint.

Abstract: An extraction interface for connecting a first flow channel to a second flow channel in an airtight manner has a main body with an extraction opening. The extraction opening has an opening plane and a sealing element that surrounds the extraction opening in the circumferential direction. In order to improve a sealing effect of the sealing element, the sealing element is an elastic bellows, which when viewed in a cross section oriented orthogonal to the opening plane has in a relaxed state of the sealing element an E-shape with at least one bending point, two legs that meet in the bending point and two leg end regions adjoining the legs. The leg end regions point radially outward in a direction facing away from the extraction opening and are connected to two locally separated connecting points of the main body.